Simplify parser core.

Originally committed as revision 13613 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 14 insertions, 30 deletions

diff --git a/libavcodec/parser.c b/libavcodec/parser.c
index 7c0c1d5054..e5a4b35061 100644
--- a/libavcodec/parser.c
+++ b/libavcodec/parser.c
@@ -118,17 +118,25 @@ int av_parser_parse(AVCodecParserContext *s,
         k = (s->cur_frame_start_index + 1) & (AV_PARSER_PTS_NB - 1);
         s->cur_frame_start_index = k;
         s->cur_frame_offset[k] = s->cur_offset;
+        s->cur_frame_end[k] = s->cur_offset + buf_size;
         s->cur_frame_pts[k] = pts;
         s->cur_frame_dts[k] = dts;
+    }
 
-        /* fill first PTS/DTS */
         if (s->fetch_timestamp){
             s->fetch_timestamp=0;
-            s->last_pts = pts;
-            s->last_dts = dts;
-            s->last_offset = 0;
-            s->cur_frame_pts[k] =
-            s->cur_frame_dts[k] = AV_NOPTS_VALUE;
+        s->last_pts = s->pts;
+        s->last_dts = s->dts;
+        s->dts= s->pts= AV_NOPTS_VALUE;
+        s->offset= 0;
+        for(i = 0; i < AV_PARSER_PTS_NB; i++) {
+            if (   s->last_frame_offset >= s->cur_frame_offset[i]
+                &&(s->     frame_offset <  s->cur_frame_offset[i] || !s->frame_offset)
+                && s->last_frame_offset <  s->cur_frame_end[i]){
+                s->dts= s->cur_frame_dts[i];
+                s->pts= s->cur_frame_pts[i];
+                s->offset = s->last_frame_offset - s->cur_frame_offset[i];
+            }
         }
     }
 
@@ -139,34 +147,10 @@ int av_parser_parse(AVCodecParserContext *s,
     if (*poutbuf_size) {
         /* fill the data for the current frame */
         s->frame_offset = s->last_frame_offset;
-        s->pts = s->last_pts;
-        s->dts = s->last_dts;
-        s->offset = s->last_offset;
 
         /* offset of the next frame */
         s->last_frame_offset = s->cur_offset + index;
-        /* find the packet in which the new frame starts. It
-           is tricky because of MPEG video start codes
-           which can begin in one packet and finish in
-           another packet. In the worst case, an MPEG
-           video start code could be in 4 different
-           packets. */
-        k = s->cur_frame_start_index;
-        for(i = 0; i < AV_PARSER_PTS_NB; i++) {
-            if (s->last_frame_offset >= s->cur_frame_offset[k])
-                break;
-            k = (k - 1) & (AV_PARSER_PTS_NB - 1);
-        }
-
-        s->last_pts = s->cur_frame_pts[k];
-        s->last_dts = s->cur_frame_dts[k];
-        s->last_offset = s->last_frame_offset - s->cur_frame_offset[k];
-
-        /* some parsers tell us the packet size even before seeing the first byte of the next packet,
-           so the next pts/dts is in the next chunk */
-        if(index == buf_size){
             s->fetch_timestamp=1;
-        }
     }
     if (index < 0)
         index = 0;